[FEATURE] make bus selection default to "different config"

[jcc5018]

your mod has a default configuration setting option for most features, which is handy for most things. But when it comes to vehicle selection, can the default option be "use different configuration for this line" because if people have multiple vehicles, they most likely want to use them for different purposes, and its a bit annoying if I set up one line with the vehicles I want, only to have it overwritten when I make changes on a new one.

Alternatively, provide a settings option for their preferred default. OR a copy paste configuration as with other mods.